Well, how does a person have the grace to resist habitual sin if they don’t receive absolution?
By going to confession, with real remorse, one can gain the strength to not repeat these sing and also gets the benefit of counsel from their confessor.
Now, if someone is not truly remorseful…that’s different, yes.
But for someone who is genuinely trying…they shoudl frequent the Sacrament of Confession. What of they died with that mortal sin on their soul? That would be tragic.
We ave the sacraments for a reason. We need them, We need the grace.
One can have remorse, and thus be ready…whether they can resist the temptation, only they know. But the confessor can guide them.